EP1342770B1 - Polymerisierbare Flüssigkristallverbindung, Flüssigkristallpolymer und deren Anwendungen - Google Patents

Polymerisierbare Flüssigkristallverbindung, Flüssigkristallpolymer und deren Anwendungen Download PDF

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Publication number
EP1342770B1
EP1342770B1 EP03004819A EP03004819A EP1342770B1 EP 1342770 B1 EP1342770 B1 EP 1342770B1 EP 03004819 A EP03004819 A EP 03004819A EP 03004819 A EP03004819 A EP 03004819A EP 1342770 B1 EP1342770 B1 EP 1342770B1
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liquid crystal
group
independently represent
crystal compound
polymerizable liquid
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EP1342770A1 (de
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Naoyuki Nishikawa
Ryo Nishio
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Fujifilm Corp
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Fuji Photo Film Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
    • C09K19/322—Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/38—Polymers

Definitions

  • the present invention relates to a polymerizable liquid crystal compound usable as a photoelectric functional material, a liquid crystal polymer, and an optical retardation film, an optically anisotropic substance (an optically anisotropic element), a nonlinear optical device and an electro-optical device using the liquid crystal polymer.
  • liquid crystal compounds with polymerizable groups can be easily converted to optically anisotropic materials by polymerizing them in a liquid crystal state, they are used for optical devices such as optical compensating plates (retardation plates) of liquid crystal displays and optical elements of optical heads.
  • the liquid crystal compounds have been used for optical compensating plates of STN liquid crystal displays (EP 0,423,881, etc.), polarizing beam splitters (EP 0,428,213, etc.), etc.
  • the liquid crystal compounds suitable for the optical devices are disclosed in EP 0,261,712, EP 0,331,233, EP 0,405,713, WO 93/22397, etc.
  • JP 11-322690 A discloses a compound represented by the formula (III): wherein R 1 represents a hydrogen atom or a methyl group, R 2 represents a lower alkyl group, and n 3 represents an integer of 4 or more.
  • R 1 represents a hydrogen atom or a methyl group
  • R 2 represents a lower alkyl group
  • n 3 represents an integer of 4 or more.
  • the compound exhibits a narrow transparent region and is easily cis-trans-isomerized by ultraviolet radiation because of the azo bond. Therefore, improvement is desired.
  • JP 59-163358 A Disclosed in JP 59-163358 A is a compound with a hydroxynaphthalene skeleton, which is represented by the formula (IV): wherein R 3 represents a substituted or unsubstituted alkyl group or acyl group. Though this compound is a liquid crystal compound, it is poor in stability because it has no polymerizable group. Further, disclosed in JP 8-73486 A is a phosphate compound represented by the formula (V): However, this compound is not a polymerizable liquid crystal compound.
  • an object of the present invention is to provide a polymerizable liquid crystal compound having excellent anisotropy in a refractive index and a wide transparent region, which is resistant to cis-trans-isomerization by ultraviolet radiation, and a liquid crystal polymer prepared by the polymerization of the above polymerizable liquid crystal compound.
  • Another object of the present invention is to provide an optical retardation film and an optically anisotropic substance (an optically anisotropic element) having large anisotropy in a refractive index.
  • a further object of the present invention is to provide a nonlinear optical device and an electro-optical device having a wide transparent region, which are resistant to cis-trans-isomerization by light.
  • a novel, polymerizable liquid crystal compound with a particular structure is suitably usable as a photoelectric functional material applicable for an optical retardation film and an optically anisotropic substance with large anisotropy in a refractive index, and a nonlinear optical device and an electro-optical device with stability and a wide transparent region.
  • the present invention has been completed based on this finding.
  • a polymerizable liquid crystal compound of the present invention is represented by the formula (I): wherein P 1 and P 2 independently represent a polymerizable group; A 1 , A 2 , L 1 and L 2 independently represent a divalent linking group of constituted by a single bond, an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, a substituted or unsubstituted imino group, or a combination thereof; S 1 and S 2 independently represent a divalent linking group; Cy 1 and Cy 2 independently represent a cyclic group having 5 to 14 carbon atoms; and each of n 1 and n 2 represents an integer, the sum of n 1 and n 2 being 0 to 2.
  • the polymerizable liquid crystal compound is preferably represented by the formula (II): wherein P 1 and P 2 independently represent a polymerizable group; A 1 and A 2 independently represent a divalent linking group constituted by a single bond, an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, a substituted or unsubstituted imino group, or a combination thereof; S 1 and S 2 independently represent a divalent linking group; and X represents an oxygen atom, a sulfur atom, or a substituted or unsubstituted imino group.
  • the polymerizable liquid crystal compound represented by the formula (I) or (II) exhibits particularly excellent photoelectric functions (1) when at least one of P 1 and P 2 is an acryloyloxy group or a methacryloyloxy group, and/or (2) when one of A 1 and A 2 is an oxygen atom, a sulfur atom, or a substituted or unsubstituted imino group, the other being a carbonyloxy group or a sulfonyloxy group.
  • the polymerizable liquid crystal compound of the present invention is represented by the formula (I):
  • P 1 and P 2 independently represent a polymerizable group.
  • the polymerizable group include an acryloyloxy group, a methacryloyloxy group, a glycidyl group, a vinyloxy group, etc.
  • At least one of P 1 and P 2 is preferably an acryloyloxy group or a methacryloyloxy group, and it is more preferred that both of P 1 and P 2 are an acryloyloxy group or a methacryloyloxy group.
  • a 1 , A 2 , L 1 and L 2 independently represent a divalent linking group constituted by a single bond, an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, a substituted or unsubstituted imino group, or a combination thereof.
  • a 1 and A 2 are preferably an oxygen atom, a sulfur atom, a carbonyloxy group (-COO-), an oxycarbonyl group (-OCO-), a sulfonyloxy group or a substituted or unsubstituted imino group, respectively.
  • one of A 1 and A 2 is an oxygen atom, a sulfur atom, or a substituted or unsubstituted imino group, while the other is a carbonyloxy group (-COO-) or a sulfonyloxy group.
  • Each of L 1 and L 2 is preferably a single bond, a carbonyloxy group (-COO-), an oxycarbonyl group (-OCO-), a carbonylimino group (-CONH-) or an iminocarbonyl group (-NHCO-), more preferably a single bond, a carbonyloxy group (-COO-) or an oxycarbonyl group (-OCO-).
  • each of L 1 and L 2 is preferably a single bond or a carbonyloxy group.
  • S 1 and S 2 independently represent a divalent linking group.
  • S 1 and S 2 may have a heteroatom, a cyclic structure and/or a substituent. Preferred examples of the substituent include lower alkyl groups, halogen atoms, etc.
  • the configuration may be any of R, S and RS.
  • Each of S 1 and S 2 is preferably a divalent linking group having 2 to 14 carbon atoms, more preferably an alkylene group having 2 to 10 carbon atoms.
  • Cy 1 and Cy 2 independently represent a cyclic group having 5 to 14 carbon atoms.
  • Cy 1 and Cy 2 may have a monocyclic structure or a polycyclic structure such as a condensed ring and a ring assemblage, and may have a non-aromatic or aromatic ring.
  • Cy 1 and Cy 2 may have a substituent on the ring, and the substituent is preferably a lower alkyl group having 1 to 6 carbon atoms, a lower alkoxyl group having 1 to 6 carbon atoms or a halogen atom, more preferably a methyl group, a chlorine atom or a bromine atom.
  • Each of Cy 1 and Cy 2 preferably has a benzene ring or a naphthalene ring, and more preferably has a benzene ring.
  • n 1 and n 2 represents an integer satisfying the condition that the sum of n 1 and n 2 is 0 to 2.
  • One of n 1 and n 2 is preferably 0.
  • n 1 or n 2 2 is 2
  • a plurality of L 1, s, L 2 's, Cy 1 's and Cy 2 's may be the same or different ones, respectively.
  • the polymerizable liquid crystal compound of the present invention is preferably represented by the formula (II): wherein P 1 , P 2 , A', A 2 , S' and S 2 are the same as those in the formula (I); and X represents an oxygen atom, a sulfur atom, or a substituted or unsubstituted imino group. X is preferably an oxygen atom.
  • the liquid crystal polymer of the present invention is prepared by polymerizing the above polymerizable liquid crystal compound of the present invention.
  • the liquid crystal polymer can be prepared by a commonly known method, for example, by a method comprising the steps of (a) applying a liquid crystal composition comprising the polymerizable liquid crystal compound to a substrate such as a glass plate, etc., and (b) polymerizing the polymerizable liquid crystal compound in an oriented state.
  • the substrates used in the production of the liquid crystal polymer is preferably glass plates, polymer films, reflecting plates, etc.
  • the liquid crystal composition may comprise the polymerizable liquid crystal compound of the present invention, a solvent, and if necessary, an appropriate additive, which may be known, such as a polymerization initiator, a polymerization inhibitor, a photosensitizer, a cross-linking agent, an auxiliary agent for orienting liquid crystal, etc.
  • the amounts of the additives added to the liquid crystal composition are not particularly limited, the total weight of the additives is preferably 30% by mass or less, more preferably 15% by mass or less, based on 100% by mass of the entire liquid crystal composition.
  • the solvent is not limited and may be tetrahydrofuran (THF), etc.
  • the liquid crystal composition may be applied to the substrate by a known method, examples of which include a curtain coating method, an extrusion coating method, a roll coating method, a spin coating method, a dip coating method, a bar coating method, a spray coating method, a slide coating method, a printing method, etc.
  • the orientation of the polymerizable liquid crystal compound may be achieved, for example, by subjecting the above substrate to an orientation treatment beforehand.
  • a preferred example of the orientation treatment of the substrate is a method in which a liquid crystal-orienting layer such as a polyimide orientation film (serves as an alignment film) and a polyvinyl alcohol orientation film (serves as an alignment film) is disposed on the substrate and subjected to rubbing, etc.
  • the orientation of the polymerizable liquid crystal compound can also be achieved by a method in which a magnetic or electric field, etc. is applied to the liquid crystal composition on the substrate.
  • the polymerizable liquid crystal compound is preferably oriented by applying an electric field.
  • the electric field may be applied to the compound by applying a DC electric field or by using corona discharge, and the corona discharge is preferable.
  • the polymerizable liquid crystal compound may be polymerized by a known method utilizing heat or an electromagnetic wave. Preferred among polymerization methods using an electromagnetic wave is a radical polymerization method using a photoinitiator with ultraviolet ray irradiation. It is preferred that the liquid crystal polymer is cross-linked while applying a magnetic field or an electric field.
  • the liquid crystal polymer prepared on the substrate may be used for an optical retardation film, an optically anisotropic substance, a nonlinear optical device, an electro-optical device, etc. without modification, and may be peeled off from the substrate or transferred onto another substrate, if necessary.
  • the liquid crystal polymer of the present invention can be suitably used for an optical retardation film, an optically anisotropic substance, a nonlinear optical device, an electro-optical device, etc. Since these devices themselves are known, their brief explanation will be given below.
  • the optical retardation film and the optically anisotropic substance can be used as a retardation film of liquid crystal displays, an optical compensating plate (retardation plate) of liquid crystal displays, a polarizing beam splitter, etc.
  • the nonlinear optical device and the electro-optical device can be used for waveguide-type light modulation devices, optical switches, etc.
  • 1,2-dihydro-7-hydroxynaphthalene-3-carboxylic acid thus obtained was dispersed in 500 mL of toluene, and 30 mL of methanol and 2 g of p -toluenesulfonic acid were added thereto.
  • the resultant reaction mixture was then heated and stirred under reflux for 8 hours while removing water generated in the reaction by Dean-Stark.
  • the reaction mixture was washed with water and concentrated under a reduced pressure, and the residue was recrystallized from acetonitrile to obtain 17.2 g of methyl 1,2-dihydro-7-hydroxynaphthalene-3-carboxylate.
  • the reaction mixture was extracted with ethyl acetate after the addition of water, and the resultant organic phase was dried with sodium sulfate and concentrated under a reduced pressure.
  • Compound 2 was synthesized in the same manner as in Example 1 except for using 4-acryloyloxybutyl 4-hydroxybiphenyl-4'-carboxylate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • the structure of the synthesized Compound 2 was confirmed by NMR and MS spectra, and the phase behavior thereof was determined as follows.
  • Compound 3 was synthesized in the same manner as in Example 1 except for using 10-acryloyloxydecyl 4-hydroxybiphenyl-4'-carboxylate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • the structure of the synthesized Compound 3 was confirmed by NMR and MS spectra, and the phase behavior thereof was determined as follows.
  • Compound 4 was synthesized in the same manner as in Example 1 except for using acetyloxyoctyl chloride in place of acetyloxybutyl chloride.
  • the structure of the synthesized Compound 4 was confirmed by NMR and MS spectra, and the phase behavior thereof was determined as follows.
  • Compound 5 was synthesized in the same manner as in Example 1 except for using acetyloxyoctyl chloride in place of acetyloxybutyl chloride, and using 4-acryloyloxybutyl 4-hydroxybiphenyl-4'-carboxylate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • the structure of the synthesized Compound 5 was confirmed by NMR and MS spectra, and the phase behavior thereof was determined as follows.
  • Compound 6 was synthesized in the same manner as in Example 1 except for using 4-acryloyloxybutyl 4-aminobenzoate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • Compound 7 was synthesized in the same manner as in Example 1 except for using 4-acryloyloxybutyl 4-aminobenzenesulfonate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • Compound 8 was synthesized in the same manner as in Example 1 except for using 4-acryloyloxybutyloxyphenol in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • Compound 12 was synthesized in the same manner as in Example 11 except for using acetyloxyethyl chloride in place of acetyloxybutyl chloride, and using 4-hydroxybutyl acrylate in place of 2-hydroxyethyl acrylate.
  • Compound 13 was synthesized in the same manner as in Example 11 except for using acetyloxyhexyl chloride in place of acetyloxybutyl chloride, and using 6-hydroxyhexyl acrylate in place of 2-hydroxyethyl acrylate.
  • Compound 14 was synthesized in the same manner as in Example 1 except for using methacryloyl chloride in place of acryloyl chloride and using 10-methacryloyloxydecyl 4-hydroxybiphenyl-4'-carboxylate in place of 2-acryloyloxyethyl 4-hydroxybiphenyl-4'-carboxylate.
  • Compound 15 was synthesized in the same manner as in Example 11 except for using methacryloyl chloride in place of acryloyl chloride, and using 2-hydroxyethyl methacrylate in place of 2-hydroxyethyl acrylate.
  • the reaction mixture was extracted with ethyl acetate after the addition of water, and the extract solution was dried with sodium sulfate and concentrated under a reduced pressure.
  • Compound 17 was synthesized in the same manner as in Example 16 except for using 3-methoxy-4-(4-acryloyloxybutyloxy)-benzoic acid in place of 3-methyl-4-(4-acryloyloxybutyloxy)-benzoic acid.
  • Compound 18 was synthesized in the same manner as in Example 16 except for using 3-chloro-4-(4-acryloyloxybutyloxy)-benzoic acid in place of 3-methyl-4-(4-acryloyloxybutyloxy)-benzoic acid.
  • a glass substrate coated with a polyimide orientation film SE-150 available from Nissan Chemical Industries, Ltd. was subjected to a rubbing treatment, and a liquid crystal composition having the composition ratio shown in Table 1 below was applied thereto by a spin coating method under conditions of 1000 rpm and 20 seconds.
  • the liquid crystal composition on the substrate was dried and heated successively to achieve liquid crystal orientation, and irradiated with ultraviolet light to produce an optical retardation film having a thickness of 1.2 ⁇ m.
  • Th resultant cross-linked film exhibited refractive index anisotropy ⁇ n of 0.29 (633 nm), which was measured by ellipsometry.
  • a cross-linked film using 1,4-phenylene bis(4-[6-(acryloyloxy)hexyloxy]benzoate) described in Die Angew. Macromol. Chem., Vol. 183, Page 45 (1990) was produced as a conventional optical retardation film.
  • the conventional cross-linked film exhibited refractive index anisotropy ⁇ n of 0.14.
  • the optical retardation film according to the present invention had higher refractive index anisotropy than that of the conventional optical retardation film. Table 1.
  • Liquid Crystal Composition Component Amount Compound 1 20.0% by mass Cellulose Acetate Butyrate 0.02% by mass Photoinitiator (Irgacure 651 available from Ciba-Geigy Japan Ltd.) 0.2% by mass Sensitizer 0.06% by mass THF 79.72% by mass
  • a liquid crystal composition having the composition ratio shown in Table 2 below was applied to a glass substrate by a spin coating method under conditions of 1000 rpm and 20 seconds.
  • the liquid crystal composition on the substrate was dried and heated successively to achieve liquid crystal orientation under corona poling with a tungsten needle electrode and a direct current voltage of 5kV, and irradiated with ultraviolet light to produce a cross-linked film (nonlinear optical device) having a thickness of 0.5 ⁇ m.
  • a cross-linked film nano-linked film having a thickness of 0.5 ⁇ m.
  • Liquid Crystal Composition Component Amount Compound 4 10.0% by mass Photoinitiator (Irgacure 651 available from Ciba-Geigy Japan Ltd.) 0.20% by mass Sensitizer 0.06% by mass THF 89.74% by mass
  • the liquid crystal composition having the composition ratio shown in Table 2 was applied to an ITO glass substrate by a spin coating method under conditions of 1000 rpm and 20 seconds.
  • the liquid crystal composition on the substrate was dried and heated successively to achieve liquid crystal orientation under corona poling with a tungsten needle electrode and a direct current voltage of 5 kV, and irradiated with ultraviolet light to produce a cross-linked film having a thickness of 0.5 ⁇ m.
  • Aluminum was then deposited on the cross-linked film to obtain an electro-optical device.
  • the electro-optic effect of the resultant electro-optical device was confirmed by a method described in Appl. Phys. Lett., Vol. 56, Page 1734 (1990).
  • the polymerizable liquid crystal compound of the present invention is excellent as a photoelectric functional material, and the liquid crystal polymer prepared therefrom can be suitably used for the optical retardation film, the optically anisotropic element, the nonlinear optical device and the electro-optical device.

Claims (12)

  1. Polymerisierbare Flüssigkristallverbindung, wiedergegeben durch die Formel (1):
    Figure imgb0031
     worin P1 und P2 unabhängig eine polymerisierbare Gruppe bedeuten, A1, A2, L1 und L2 unabhängig eine zweiwertige Verbindungsgruppe bedeuten, bestehend aus einer Einfachbindung, einem Sauerstoffatom, einem Schwefelatom, einer Carbonylgruppe, einer Sulfonylgruppe, einer substituierten oder unsubstituierten Iminogruppe oder einer Kombination davon, S1 und S2 unabhängig eine zweiwertige Verbindungsgruppe bedeuten, Cy1 und Cy2 unabhängig eine cyclische Gruppe mit 5 bis 14 Kohlenstoffatomen bedeuten, und jedes von n1 und n2 eine ganze Zahl bedeutet, wobei die Summe von n1 und n2 0 bis 2 ist.
  2. Polymerisierbare Flüssigkristallverbindung nach Anspruch 1, worin n1 0 ist, und n2 1 oder 2 ist.
  3. Polymerisierbare Flüssigkristallverbindung nach Anspruch 1 oder 2, worin n1 0 ist, und n2 2 ist.
  4. Polymerisierbare Flüssigkristallverbindung gemäß einem der Ansprüche 1 bis 3, worin die polymerisierbare Flüssigkristallverbindung durch die Formel (II) wiedergegeben wird:
    Figure imgb0032
     worin P1 und P2 unabhängig eine polymerisierbare Gruppe bedeuten, A1 und A2 unabhängig eine zweiwertige Verbindungsgruppe bedeuten, bestehend aus einer Einfachbindung, einem Sauerstoffatom, einem Schwefelatom, einer Carbonylgruppe, einer Sulfonylgruppe, einer substituierten oder unsubstituierten Iminogruppe oder einer Kombination davon, S1 und S2 unabhängig eine zweiwertige Verbindungsgruppe bedeuten, und X ein Sauerstoffatom, ein Schwefelatom oder eine substituierte oder unsubstituierte Iminogruppe bedeutet.
  5. Polymerisierbare Flüssigkristallverbindung gemäß einem der Ansprüche 1 bis 4, worin wenigstens eine von P1 und P2 eine Acryloyloxygruppe oder eine Methacryloyloxygruppe ist.
  6. Polymerisierbare Flüssigkristallverbindung gemäß einem der Ansprüche 1 bis 5, worin eine von A1 und A2 ein Sauerstoffatom, ein Schwefelatom oder eine substituierte oder unsubstituierte Iminogruppe ist, und die andere eine Carbonyloxygruppe oder eine Sulfonyloxygruppe ist.
  7. Flüssigkristallpolymer, hergestellt durch Polymerisieren der in einem der Ansprüche 1 bis 6 genannten polymerisierbaren Flüssigkristallverbindung.
  8. Flüssigkristallzusammensetzung, umfassend ein Lösemittel und wenigstens eine polymerisierbare Flüssigkristallverbindung, die in einem der Ansprüche 1 bis 6 genannt ist.
  9. Optischer Retardationsfilm, umfassend wenigstens eine Schicht, umfassend ein in Anspruch 7 genanntes Flüssigkristallpolymer.
  10. Optisch anisotropes Element, umfassend das in Anspruch 7 genannte Flüssigkristallpolymer.
  11. Nichtlineare optische Vorrichtung, umfassend das in Anspruch 7 genannte Flüssigkristallpolymer.
  12. Elektrooptische Vorrichtung, umfassend das in Anspruch 7 genannte Flüssigkristallpolymer.
EP03004819A 2002-03-04 2003-03-04 Polymerisierbare Flüssigkristallverbindung, Flüssigkristallpolymer und deren Anwendungen Expired - Lifetime EP1342770B1 (de)

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US11702396B2 (en) 2017-02-15 2023-07-18 Johnson & Johnson Surgical Vision, Inc. Hydrophobic compounds for optically active devices
US11753387B2 (en) 2017-02-15 2023-09-12 Johnson & Johnson Surgical Vision, Inc. Compounds for optically active devices
US11958819B2 (en) 2015-08-21 2024-04-16 Johnson & Johnson Surgical Vision, Inc. Compounds for optically active devices

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Publication number Priority date Publication date Assignee Title
US11958819B2 (en) 2015-08-21 2024-04-16 Johnson & Johnson Surgical Vision, Inc. Compounds for optically active devices
US11702396B2 (en) 2017-02-15 2023-07-18 Johnson & Johnson Surgical Vision, Inc. Hydrophobic compounds for optically active devices
US11753387B2 (en) 2017-02-15 2023-09-12 Johnson & Johnson Surgical Vision, Inc. Compounds for optically active devices

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DE60305545D1 (de) 2006-07-06

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